SLM
- SLM Corporation
- SLM International
- Salamanca Airport
- Selective laser melting
- Situational leadership model
- Sliema
- Small language model
- Solomon Islands
- Spatial light modulator
- St. Louis Music
- Stan Lee Media
- Standard litre per minute
- Sudan Liberation Movement/Army
- Surinaamse Luchtvaart Maatschappij
- Sustainable land management
- Swiss Locomotive and Machine Works
- Š-L-M